Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 258, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Sep 5, 2012, 7:56 AM CDT for Greene County, Macoupin County, Montgomery County, Illinois. It was in force for 64 min. 9 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Sep 5, 2012, 7:56 AM CDT (12:56 UTC)
- Expired
- Sep 5, 2012, 9:00 AM CDT
- In force
- 64 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Greene County, IL, Macoupin County, IL, Montgomery County, IL
The radar
The St Louis radar (KLSX), 99 km from the middle of the area, began a volume at 12:56 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 5, 8:20 AM CDT | TSTM WND DMG | Nilwood, IL | POWER POLE BROKEN OFF AT BASE. POWER OUT TO TOWN OF NILWOOD. |
| Sep 5, 8:25 AM CDT | TSTM WND DMG | Girard, IL | TREES DOWN IN GIRARD |
| Sep 5, 8:35 AM CDT | TSTM WND GST 47 | 1 Sw Litchfield, IL | |
| Sep 5, 8:40 AM CDT | TSTM WND DMG | Raymond, IL | GUTTER WAS TORN OFF A NEIGHBORHOOD HOUSE AND A TREE LIMB DOWN. |
| Sep 5, 8:50 AM CDT | TSTM WND DMG | Litchfield, IL | TREES AND POWER LINES DOWN IN LITCHFIELD. |
| Sep 5, 8:53 AM CDT | TSTM WND DMG | Litchfield, IL | POWER LINES AND LARGE TREES DOWN IN NORTH LITCHFIELD. |
| Sep 5, 8:54 AM CDT | TSTM WND GST 60 | 1 N Irving, IL | SEVERAL TWO TO THREE INCH LIMBS DOWN. |
| Sep 5, 9:07 AM CDT | TSTM WND DMG | Hillsboro, IL | MONTGOMERY COUNTY SHERIFFS OFFICE REPORT TREES DOWN IN HILLSBORO. |
| Sep 5, 9:10 AM CDT | TSTM WND DMG | Litchfield, IL | POWER LINES AND TREES DOWN IN LITCHFIELD... REPORTED BY ILLINOIS STATE DISTRICT 11. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 0.9 hours before the alert went out and 142 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1271 J/kg
- Mixed-layer CIN
- -188 J/kg
- Mixed-layer LCL
- 1037 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 107 m²/s²
- 0-3 km storm-relative helicity
- 138 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
934
WUUS53 KLSX 051256
SVRLSX
ILC061-117-135-051400-
/O.NEW.KLSX.SV.W.0258.120905T1256Z-120905T1400Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
756 AM CDT WED SEP 5 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
EAST CENTRAL GREENE COUNTY IN SOUTHWEST ILLINOIS...
MACOUPIN COUNTY IN SOUTHWEST ILLINOIS...
SOUTHWESTERN MONTGOMERY COUNTY IN SOUTH CENTRAL ILLINOIS...
* UNTIL 900 AM CDT
* AT 752 AM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
LINE EXTENDING FROM THAYER TO 5 MILES WEST OF PALMYRA TO WHITE
HALL...AND MOVING SOUTHEAST AT 45 MPH.
HAZARD...60 MPH WIND GUSTS.
SOURCE...RADAR INDICATED.
IMPACT...MINOR TREE DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER
BROKEN.
* LOCATIONS IMPACTED INCLUDE...
VIRDEN...CARLINVILLE...LITCHFIELD...GILLESPIE...HILLSBORO...
STAUNTON...GREENFIELD...GIRARD...FARMERSVILLE...RAYMOND...BENLD...
WILSONVILLE...MOUNT OLIVE...TAYLOR SPRINGS...HETTICK...NILWOOD...
STANDARD CITY...CHESTERFIELD...WAGGONER AND ATWATER.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
LARGE HAIL...DAMAGING WINDS AND CONTINUOUS CLOUD TO GROUND LIGHTNING
IS OCCURRING WITH THESE STORMS. MOVE INDOORS IMMEDIATELY. LIGHTNING
KILLS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO
BE STRUCK BY LIGHTNING.
&&
LAT...LON 3903 8955 3900 8991 3924 9015 3926 9015
3926 9018 3944 9038 3948 9016 3953 9005
3953 8966 3940 8952 3936 8953 3935 8947
3920 8931
TIME...MOT...LOC 1256Z 314DEG 38KT 3953 8979 3940 9005
3937 9037
HAIL...<.75IN
WIND...60 MPH
$$
BROWNING2 follow-up statements
473
WWUS53 KLSX 051340
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
840 AM CDT WED SEP 5 2012
ILC061-117-135-051400-
/O.CON.KLSX.SV.W.0258.000000T0000Z-120905T1400Z/
MACOUPIN IL-MONTGOMERY IL-GREENE IL-
840 AM CDT WED SEP 5 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EAST CENTRAL
GREENE...SOUTHWESTERN MONTGOMERY AND MACOUPIN COUNTIES UNTIL 900 AM
CDT...
AT 837 AM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
LINE EXTENDING FROM WITT TO MOUNT OLIVE TO BUNKER HILL...AND MOVING
SOUTHEAST AT 45 MPH.
HAZARD...60 MPH WIND GUSTS.
SOURCE...PUBLIC REPORTED A POWER POLE SNAPPED OFF NEAR NILWOOD AT
820 AM.
IMPACT...MINOR TREE DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER
BROKEN.
LOCATIONS IMPACTED INCLUDE...
STAUNTON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
LARGE HAIL...DAMAGING WINDS AND CONTINUOUS CLOUD TO GROUND LIGHTNING
IS OCCURRING WITH THESE STORMS. MOVE INDOORS IMMEDIATELY. LIGHTNING
KILLS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO
BE STRUCK BY LIGHTNING.
&&
LAT...LON 3903 8955 3900 8991 3924 9015 3926 9015
3926 9018 3944 9038 3948 9016 3953 9005
3953 8966 3940 8952 3936 8953 3935 8947
3920 8931
TIME...MOT...LOC 1340Z 314DEG 38KT 3921 8936 3908 8962
3905 8994
HAIL...<.75IN
WIND...60 MPH
$$
BROWNING128
WWUS53 KLSX 051359
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
859 AM CDT WED SEP 5 2012
ILC061-117-135-051409-
/O.EXP.KLSX.SV.W.0258.000000T0000Z-120905T1400Z/
MACOUPIN IL-MONTGOMERY IL-GREENE IL-
859 AM CDT WED SEP 5 2012
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL GREENE...
SOUTHWESTERN MONTGOMERY AND MACOUPIN COUNTIES WILL EXPIRE AT 900 AM
CDT...
THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE
WARNED AREA. HOWEVER...A SECOND SEVERE THUNDERSTORM WARNING REMAINS
IN EFFECT FOR PORTIONS OF MONTGOMERY UNTIL 930 AM.
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.
LAT...LON 3903 8955 3900 8991 3924 9015 3926 9015
3926 9018 3944 9038 3948 9016 3953 9005
3953 8966 3940 8952 3936 8953 3935 8947
3920 8931
TIME...MOT...LOC 1359Z 311DEG 28KT 3919 8929 3906 8954
3900 8985
$$
TILLYThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 3:07 AM CDT | Heat Advisory | LSX | Madison, Monroe, Randolph, Saint Clair | 12 hr |
| Sep 5, 6:36 AM CDT | Severe Thunderstorm Warning | LSX | Adams, Brown, Pike | 30 min |
| Sep 5, 8:38 AM CDT | Severe Thunderstorm Warning | LSX | Fayette, Montgomery | 37 min |
| Sep 5, 9:08 AM CDT | Tornado Warning | LSX | Fayette, Montgomery | 37 min |
| Sep 5, 9:40 AM CDT | Severe Thunderstorm Warning | LSX | Fayette | 50 min |
| Sep 5, 10:00 AM CDT | Severe Thunderstorm Warning | LSX | Clinton, Fayette, Marion | 48 min |
| Sep 5, 10:23 AM CDT | Severe Thunderstorm Warning | LSX | Monroe, Saint Clair | 32 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2012Every severe thunderstorm warning in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.